Sadness is of two distinct types. The first type is the one that has a clearly identifiable cause such as the death of a beloved relative or the loss of wealth or something that the person greatly values. The second type has no obvious cause. It is a sudden distress and gloom that descends over the affected person preventing him, most of the time, from the exuberance of activity and the enjoyment of the usual pleasures of this world. The person afflicted is generally unaware of any clear reason for his dejection.